public function toAscii($removeUnsupported = true)
{
$str = $this->str;
foreach ($this->charsArray() as $key => $value) {
$str = str_replace($value, $key, $str);
}
if ($removeUnsupported) {
$str = preg_replace('/[^\\x20-\\x7E]/u', '', $str);
}
return static::create($str, $this->encoding);
}